Question

solve using gemdas. in which step of the order of operations did you find your mistake? image content omitted

Explanation:

Step1: Simplify exponents

$2^2=4$, $4^2=16$
Expression becomes: $20 - 5\times4 - (-16)$

Step2: Perform multiplication

$5\times4=20$
Expression becomes: $20 - 20 - (-16)$

Step3: Simplify subtraction of negative

$-(-16)=16$
Expression becomes: $20 - 20 + 16$

Step4: Compute left to right

$20-20=0$, then $0+16=16$

Answer:

16